English dictionary
sphenoid
/'sf/i/n//Oi//d/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
adjective
-
Wedge-shaped; as, a <i>sphenoid</i> crystal.
Source: webster1913
noun
-
butterfly-shaped bone at the base of the skull
Source: WordNet 3.0
-
A wedge-shaped crystal bounded by four equal isosceles triangles. It is the hemihedral form of a square pyramid.
Source: webster1913